317 Answered Questions for the topic astronomy

Astronomy

06/12/21

How many extra-solar planets had been found prior to Kepler's research?

How many extra-solar planets had been found prior to Kepler's research?
Astronomy

06/12/21

Why are researchers more interested in rocky planets that might be found in a star’s habitable zone, then in gaseous planets?

Why are researchers more interested in rocky planets that might be found in a star’s habitable zone, then in gaseous planets?
Astronomy

06/12/21

what are the general features that we expect any star’s habitable zone to have?

What are the general features that we expect any star’s habitable zone to have?

06/02/21

Electricity, resistance, current, voltage, physics

a circuit operates at 1000 watts, within the circuit we have a 10 ohm, 20 ohm, and 40 ohm resistors.a) if the resistors are connected in parallel, what would their equivalent resistance be? b)... more
Astronomy

05/28/21

Which of the following statements best describes cosmological redshift?

The universe (space) is expanding in front of us.Galactic clusters are rushing away from us.The universe (space) is expanding in all directions.Galactic clusters are rushing toward us.
Astronomy

05/28/21

Doppler redshift is the redshifting of spectra from objects moving away from us, and cosmological redshift is the redshifting of objects moving toward us.

Doppler redshift is the redshifting of spectra from objects moving away from us, and cosmological redshift is the redshifting of objects moving toward us.truefalse
Astronomy

05/28/21

In units only, no numbers, what is the slope of the Hubble Constant line?

Pc/sec/Kmm/sec/Mpckm/sec/MpcMkm/sec/pc

05/19/21

Potential energy/velocity

roller coaster 1: Potential energy: 1,617,000J, mass 5,500kgRollercoaster 2: potential energy: 2,205,000J, mass: 5,000kggravitational constant: 9.8 roller coaster 1 has no kinetic energy, and at... more

05/17/21

Electric Potential

Electric Potential Formula: V= K*q/rElectric potential energy Formula: UE= Kq1q2/rWhat is the electric potential energy between a particle with 1*10^-9 C of charge and a particle with -1*10^-9 C of... more
Astronomy

05/17/21

Distinguish between spiral galaxies and elliptical galaxies and describe one of each that has been viewed by HST.

Distinguish between spiral galaxies and elliptical galaxies and describe one of each that has been viewed by Hubble Space Telescope.
Astronomy

05/17/21

The last servicing mission to HST; when it occurred, what was done (briefly!), and why it almost didn’t happen at all.

The last servicing mission to Hubble Space Telescope; when it occurred, what was done (briefly!), and why it almost didn’t happen at all.
Astronomy

05/17/21

The year Hubble Space Telescope was launched; the serious flaw that was discovered when it began to send data; and how and when this flaw was fixed.

The year Hubble Space Telescope was launched; the serious flaw that was discovered when it began to send data; and how and when this flaw was fixed.
Astronomy

05/17/21

The wavelengths of the electromagnetic spectrum viewed by HST, and why HST is better than earth-based telescopes for studying objects at these wavelengths.

The wavelengths of the electromagnetic spectrum viewed by HST, and why HST is better than earth-based telescopes for studying objects at these wavelengths.
Astronomy

05/11/21

In what way are the compass directions (N, S, E, W) different from the way they appear on a street map? Why is this?

I need help understanding this
Astronomy

05/07/21

college lever astronomy

What is the distance and apparent magnitude for Antares?802 pc and 1.32.7 pc and -1.5170 pc and 1.0197 pc and 0.4
Astronomy

05/07/21

college lever astronomy

What is the brightness ratio for Antares at 10 pc?1/2891/17^2none of theseeither of these
Astronomy

05/07/21

college lever astronomy

Any star's brightness ratio when 'moved to' a new distance, or any star's brightness when compared to any other star, has an associated change in Apparent Magnitude; this is based on another simple... more
Astronomy

05/07/21

college lever astronomy

The true distance to Sirius A (simply called Sirius from here on) is about 2.5 parsecs.TrueFalse
Astronomy

05/07/21

astronomy college level

Based on the Inverse Square Law, what is the brightness ratio for Sirius?1:1616:1any of these1/16
Astronomy

05/07/21

astronomy college level

What is the magnitude difference for Betelgeuse at 10 pc?6.5063882.5197^2
Astronomy

05/07/21

astronomy college level

What is the approximate Absolute Magnitude for Sirius, now that we have corrected for its distance?2.5-1.51.51.0
Astronomy

04/29/21

Really bright or hot stars on the HR-diagram plot to the lower right.

Astronomy Physics

04/25/21

The power output of the Sun PSun = 3.8 × 1026 W. Write down an equation describing the relationship between PSun and ESun the total energy radiated during a time t.

Use this equation to calculate how much energy is produced by the Sun every minute and give your answer in joules (J) to 2 sf.I can't find anything in my material from school that is remotely... more

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.